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<!-- Write all pull request text in Simplified Technical English (ASD-STE100): short sentences, one instruction per sentence, simple approved vocabulary, and the active voice. --> ## Thinking Path > - Paperclip helps operators supervise agent work through tasks and task threads. > - The redesigned task thread shows the current work and its state. > - A blocked task did not show the dependency that prevented progress. > - Operators had to leave the thread to find the direct and final blockers. > - This pull request adds compact blocker links at the top and bottom of the task thread. > - The benefit is that operators can identify and open the relevant tasks without adding a large notice to the thread. ## Linked Issues or Issue Description **What existing behavior does this improve?** The redesigned task thread did not show which task directly blocked the current task or which task ultimately blocked its dependency chain. **Subsystem affected** `server/`, `packages/shared/`, and `ui/` task-blocker presentation. **Current behavior** A blocked task can open in the redesigned thread without a visible dependency link at the top or bottom of the conversation. **Proposed behavior** Show one compact amber row for the direct blocker. Show a second row for the selected final blocker when one exists. Render the rows at both ends of the thread. **Reason and benefit** Operators can see the reason for the blocked state and open the relevant task from the conversation. The compact rows preserve thread density. **Breaking changes** None. The new blocker-attention fields are optional. Existing clients remain compatible. ## What Changed - Added a compact task-chat component for direct and selected final blocker links. - Added the blocker rows to the top and bottom of populated and empty task threads. - Added link-ready blocker-attention details so an intermediate selected task stays on its correct direct chain. - Included blocker-link changes in the thread content key so pinned threads follow a newly added bottom row. - Added component, scrolling, server contract, and Storybook coverage for the new states. ## Verification - `pnpm exec vitest run ui/src/components/TaskChatThread.test.tsx server/src/__tests__/issue-blocker-attention.test.ts` (38 tests passed) - `pnpm --filter @paperclipai/shared typecheck` - `pnpm --filter @paperclipai/server typecheck` - `pnpm --filter @paperclipai/ui typecheck` - `pnpm check:token-gates` ## Risks - Low risk. The rows only render while the task status is `blocked` and an unresolved blocker is available. - Long titles are truncated to keep each blocker on one line. The full task label remains available in the link title. - Older server payloads keep the original leaf-selection behavior because the new sampled details are optional. > For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and discuss it in `#dev` before opening the PR. Feature PRs that overlap with planned core work may need to be redirected — check the roadmap first. See `CONTRIBUTING.md`. ## Model Used - OpenAI Codex with GPT-5. The run used tool-enabled reasoning and code execution. The context-window size was not exposed to the run. ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with `Fixes: #` / `Closes #` / `Refs #` OR (b) described the issue in-PR following the relevant issue template - [x] I have not referenced internal/instance-local Paperclip issues or links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip` URLs) - [x] My branch name describes the change (e.g. `docs/...`, `fix/...`) and contains no internal Paperclip ticket id or instance-derived details - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [x] All Paperclip CI gates are green - [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge --------- Co-authored-by: Paperclip <noreply@paperclip.ing>